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Finding the Fourth Proportional to 486.72, 730.80 and 294.48

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Solution

The fourth proportional to 486.72, 730.80 and 294.48 is: 442.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.72 : 730.80 = 294.48 : x
  2. Step 2: Convert to fraction form
    486.72/730.80 = 294.48/x
  3. Step 3: Cross multiply
    486.72x = 730.80 × 294.48
  4. Step 4: Simplify right side
    486.72x = 215,205.98
  5. Step 5: Solve for x
    x = 215,205.98/486.72
  6. Step 6: Final answer
    x = 442.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.